Rackspace's OpenStack: Where Do We Go From Here

There's a new kid in town when it comes to open source code in the cloud. It's Rackspace's OpenStack, based on both Rackspace's and NASA Nebula's existing cloud engines. Wasn't there already sufficient open source code in play? Why do we need this initiative on top of those already afoot? Actually, we need 3-4 such initiatives.